Abstract-In this paper, an extended run time DC UPS system structure with fuel cell and supercapacitor is investigated. A wide input range bi-directional dc-dc converter is described along with the phase-shift modulation scheme and phase-shift with duty cycle control, in different modes. The delivered power and peak current are analyzed and calculated. The key parameters of the bi-directional dc-dc converter, the relationships between the input voltage, phase-shift angle, ratio of the transformer and leakage inductance are analyzed and optimized. Build the system mathematic model and a novel input voltage combined with load current feedback using PI controller with anti-windup scheme to realize closed-loop control of the whole system, and verify the feasibility of the control scheme proposed by simulation. A 1kW prototype controlled by TMS320F2808 DSP is implemented and tested. Experimental results show the validity of design.
|Title of host publication||Twenty-Fourth Annual IEEE Applied Power Electronics Conference and Exposition, 2009. APEC 2009|
|Publication status||Published - 2009|
|Event||2009 24th Annual IEEE Applied Power Electronics Conference and Exposition - Washington DC, United States|
Duration: 15 Feb 2009 → 19 Feb 2009
Conference number: 24
|Conference||2009 24th Annual IEEE Applied Power Electronics Conference and Exposition|
|Period||15/02/2009 → 19/02/2009|